Lifter for valve springs



Oct. 19 1926.

' L. M. WOOD LIFTER FOR VALVE SPRINGS 2 sheetssheet 1 Filed Jan. 4, 1924RW@ www mf f m A 1 n..- ,nu ....HHU HAMM o V Q 1 j WW HMI- r1! B @w n uil@ um Q@ ,f Nm QW FQ, I QN HT; bw l) 4NI iufm? u n n.. u u n u @l QM 11 1i r w.

Oct. 19 1926.

L M WOOD L IFTER :FORy VALVE SPRINGS 2 Sheets-Sheet 2 Filled Jan. 4,1924 ed @ch '11.9, 1.92.5.

narra sf'ra'rs Parnu-r LG?) 1S MAECEI'LLUS YORK.

Woon, or*- NEW YORK. n, Y.. Assrofnoa To srnnn-o MU'nrrrLi-i' vanvnnrr'rnn oonronn'rron. or new renie.. n. Y.. a. oonronarrorior eine!LIFTER FR VALVE SEEENGS.

Application iiled. January This invention relates to lifters adapted forthe purpose of lifting or elevating under con'ipression a plurality ofvalve springs in internal combustion engines, and more particularly tolifters adapt-,ed to siimilt'aneously lift a multiple number' of valvespringe7 an object of the invention being to provide an improved valvespring lifter which vv'ill be relative-ly simple in construction,relatively easy and cheap to manu'fact'ureyand'so con'- structed that anumber of valve springs may' be elevated under compression With akmini-Y mum of cfl'ort and Without the exertion of any considerableamount of strength.

A further object of thisl invention is to provide a valve spring lifterhaving improved cam means forI lifting the valve springs of the engineunder compression whereby in operation the force exerted by the cammeans ivill be so applied and dierected as to elevate the lifting memberin a substantially straight vertical plane7 thereby limiting anymaterial tendency of the lift' ing member to move or shift' relativelytothe valves during operation.

A further object of this invention is to" ency of the littingm'ember toshift in transverse directions relatively to the valves duringoperation.

Other objects of this invention vWill appear in the followingdescription and aps pended claims, reference being had to theaccompanying drawings forming a part. of this specification wherein likerefer-ence characters indicate co'rres'ponding` parts'in' the severalviews and wherein Fig. l is a front elevation illustrating an embodimentof my invention inoperative position; Fig., 2 is a tially on line .2-2of Fig. l; Figi 3 is a ginent'ary sectional sideeljevation taken ouseccional side elevation taken substane serial no. Geneva line 3 3 ofFig. l and illustrating the valve springs 1n lifted' position; Fig. l isa p`ersp'ective view illustrating a present embodiment of my invention;Fig. 5 is a perspec tive vieiv of a cam member; Fig. 6 is a fragmentarylongitudinal sect-ion taken through the cam block and illustrating theposition of one ofthe cams with the lifting member in eleva-tedposition, andv Figiv is atransverse section taken substantially on line7-7 of Fig. 6. n

n Before explaining in detail the present improvement and modeofvoperation there of, I desire to have itunderstood that theinvention'is not limited-tothe details of construction and arrangementof parts WhichA are illustrated in the accompanying drawings, since theinvention is capable of other embodiments, and that thev phraseologywhich I employ is for the purpose of de scription and notof'limit-ation.

rEhe present improved mechanism for elevating or liftingundercompression the several valve springs of the engine is of course,adapted to be used in connection with various types ofv engines. andalthough one form of' engine is herein illustrated by Way of enample itis obvious that. the mechan,i "i may be adapted to other engines havingdi .'erent numbers of cylinders. It is also understood that the form anddesign ofthe mechanism may be altered in order to adapt the mecha n ismto different engines having different forms vand arrangement of parts.

Referring to. the drawings wherein a present preferred form of myvinvention is( shown, it will be seen that the engine block is provided?With the usual valve spring chamber 9 which is adapted to be closed atthe front thereof with a suitable cover or door plate (not shown). Thecover plate in the engine illustrated herein by vvay of ezrample is heldin lposition by means oi'k a ixedfbolt orstud'() having a nut ladaptedto be'screyvedon tothe outer end of the bolt l or' stud; lnsoineinstancesthe cover or door plate is held in positionv means of abolt ornstud which is headed at. its outer end and adapted to be screwedVinto the rear' ivall of thevalvespring chamber. The valve spring lchamber 9`is located Within` a housing or casing comprising rearcylinder xvallsj l0 and forwardly extending `end Walls l rlheA front ofthe'` valve: spring housing is also providedwith a dependingy lipV l2and also with the usual upwardly projecting lip or flange 13 extendingalong the lower edge thereof and against which the cover or door plateis normally bolted. The valves 14 are provided with valve stems 15 whichextend into the chamber 9, and adjacent to the lower ends of the valvestems are located retaining pins 16 against which the valve springretaining seats 17 impinge when the valve springs are in normalposition, the seats or retainers 17 being constructed to receive thelower ends of the valve springs 18 which are held between the retainersand the upper wall of the chamber 9. The bottom of the valve springhousing is provided with the usual guide members or bearings 19 throughwhich the valve lifters 20 extend, the latter being operated by cams onthe cam shaft of the engine for the purpose of operating the valves.

The valve lifter in the present instance is preferably in the form of anangle bar which may be readily made in a single casting, the angle barcomprising a vertically extending member 21 and a horizontally eX-tending member 22. The part 21 of the angle bar extends across or infront of the four valves and valve springs, and the horizontal part 22of the bar forms a means adapted to extend beneath the valve springs andretainers for operating thereagainst. Centrally of the lifter the member21 is provided with a. rearward extension or enlarged portion 23` andthe member 22 is provided with an enlarged portion 24, the parts 23 and24 being cast integrally. rlhe central enlarged portion 23 of thelifting member is provided with a vertical guide slot 25 whichcommunicates with a horizontally extending slot or groove 26 formed inthe central eXtensi'on 24 of the lifting member. The purpose andfunction of the slots 25 and 26 are to receive the housing bolt and topermit the lifting member to be guided by such bolt against endwisemovement relatively to the valve springs, and also to enable the liftingmember to be readily positioned with relation to the valve springs.

The rear face of the central portion 23 of the lifting member isrecessed at 27, and at the bottom of such recess a pair of projectionsor abutments 28 are formed, the projections 28 being located at oppositesides of the guide slot 25. These projections are bored to permit thepassage therethrough of the gu-fle screws as hereinafter described.

The horizontal member 22 of the lifter is provided at suitable intervalswith rearwardly extending slots or recesses 29 into which the valvestems extend, the sides of the recesses 29 forming seats .for the valvespring retainers 17.

It will be noted that the valve spring recesses 29 extend rearwardly thefull width Of the horizontal member 22, and that these recesses or slotsterminate at the rear thereof in vertically extending recesses 30 formedin the vertical member 21 of the lifting bar. It will be seen that animportant advantage is derived for forming the valve spring re cesses29, 30 in this manner, since it is posrsible for the operator after thevalve lifter has been elevated against the valve springs to insert thefingers for the purpose of removing the pins 1G or replacing them.

The lifting member in the present intance is operated by a cam meanswhich comprises a suitable supporting block 31 having a transverselyextending slot or groove 32 for receiving a rotatable spindle 33. Thespindle 33 is provided with a pair of spaced cams 34, each cam at oneside having a curved working face 35 terminating in an approximatelyflat face 35a. It will be seen that the spindle 33 carrying the spacedcams has a bearing in the cam block 31 and is adapted to be rotated forthe purpose of swinging the cams from a horizontal to a verticalposition, and vice versa, by means of a suitable wrench 52 which may beinserted over the .squared end 37 of the spindle or shank It will benoted that the transverse slot or recess 32 is open at the top therebypermitting the spindle 33 to be readily inserted therein and removed. Itwill also be noted that the supporting block 31 is provided at one sidewith a pair of spaced slots 31a for receiving and housingl the cams 34when the latter are shifted downwardly into the position shown in Fig.4, thereby causing the lifting bar to rest upon the upper face of thecam block when in lowered position.

At opposite sides of the spindle 33 the cam block 31 is tapped toprovide a pair of holes into which are screwed a pair of guide screws orpins 38` these screws extending freely through holes in the projections28 and in the .extension 24. Between the heads of the .screws 38 and theupper faces of projections 28 are located a pair of coiled springs 39.These springs function normally to force the upper face of the cam block31 against the lower face of the extension 24, thus holding these-parts4together rigidly when the lifting device is not in use and when it isbeing placed in position under the valve springs.

In using the present valve lifter the nut 51 is unscrew-ed from the endof the stud bolt 50 and the cover or door plate for1 the valve springhousing removed. The angle bar is then slipped over the stud bolt 50, itbeing understood that the latter extends through the guide slot 25 asshown in Fig. 1, whereupon the nut 51 is screwed on to the end of thebolt 50 sufficiently to hold the valve lifter in proper position. Thev-.irench 52 is inserted over the squared end 3?' of spindle 33, and bymanipulating the wrench.

IUS

means for normally maintaining said member and cam means together.

6. In a valve spring lifter, the combination of a lifting barconstructed to simultaneously cooperate with a plurality of valvesprings, a supporting block located below said lifting bar, means forshiftably connecting said lifting bar with said block, and rotatable cammeans located above the supporting block and below the lifting bar andpivotally supported therebetween cross wise of the lifting bar andoperative on the rotation thereof to lift said lifting bar relative tosaid supporting block, said cam means comprising a plurality of camsspaced transversely of the lifting bar.

7. A valve spring lifter comprising a lifting member, a support, aspindle carried thereby and having a wrench-engaging portion and a pairof spaced cams carried by said spindle, said cams being in position andoperating as a unit against the lifting member directly under the lineof engagement of the lifting member with the bottoms of the valvesprings thereby to elevate the lifting member whereby the action of thecams is exerted directly under and between the margins of the springs.

8. A valve spring lifter comprising a lifting member, a support, a camcarried thereby for elevating said lifting member and a spring carryingmember connecting said lifting member and support.

9. A valve spring lifter comprising a lifting member having meansadapted to eX- tend beneath a plurality of valve springs, said memberhaving c-entrally thereof a vertical slot adapted to receive an enginestud or bolt, a support, and a cam carried there" by for elevating saidmember, said support being connected centrally to said lifting member.

10. A valve spring lifter comprising a lifting member having avertically extending guide slot adapted to receive a housing stud orbolt, cam means operative adjacentto said slot for elevating saidmember, and guide means for connecting said cam means and membertogether.

11. A valve spring lifter comprising a .cam block having a transverserecess, a rotatable spindle having a bearing in said recess, a pair ofspaced cams carried by said spindle, and a lifting member controlled bysaid cams.

12. A valve spring lifter comprising a cam lock having a transverserecess. a rotatable spindle having a bearin in said recess, a pair ofspaced cams carried by said spindle, and a lifting member controlled bysaid cams, each of said cams having at one side a curved working faceterminating in an end portion having a working face of less curvature.

13, A valve spring lifter comprising a lifting member having a guideslot adapter to receive the housing stud or bolt of the engine, cammeans for elevating said member, and guide means located at oppositesides of said guide slot for connecting said cam means and membertogether.

14:, A valve spring lifter comprising a lifting member having a guideslot adapted to receive the housing stud or bolt of the engine, cammeans for elevating said meinber, and guide means located at oppositesides of said guide slot for connecting said cam means and membertogether, said guide means having springs for maintaining said memberand cam means in predetermined position.

1 15. A valve spring lifter comprising a lifting member, cam means forelevating the same, and guide means connecting said cani means andmember together and located in rear of said cam means.

16. A valve spring lifter comprising a lifting memberl` a support, a camcarried thereby for elevating said lifting member, and a pair of spacedguide members connecting said support and lifting member in rear of saidcam.

17. A valve spring lifter comprising a lifting member, a support, a camcarried by said support for elevating the lifting member, and a guidepin slidably connecting said support and lifting member and detachablyconnected to one thereof.

18, A valve spring lifter comprising a support, a shiftable cam carriedthereby for elevating the lifting member, and a vertical member slidablyconnecting said support and lifting member and having a detachablethreaded connection with one thereof.

19. A valve spring lifter comprising a vertical member and a horizontalmember, a cam block located beneath said horizontal member, a shiftablecam carried by said block and adapted to Operate against the under faceof said horizontal member, a guide pin carried by said cam block and eX-tending through said horizontal member.

20. A valve spring lifter comprising a vertical member and a horizontalmember, said vertical member having a guide slot, cam means rlocatedbeneath said horizontal member and adapted t0 operate thereagainst forelevating the same, a pair of guide pins carried by said cam means andextending through said horizontal member at opposite sides of said guideslot.

21. In a valve spring lifter, the combina` tion of a lifting member, acam support, a rotatable spindle carried thereby, a cam carried by saidspindle for elevating said lifting member, said support having an openslot permitting removal of said spindle.

22. ln a valve spring lifter, the combination of a lifting member, a camsupport having a transverse recess open at the top, a rotatalole spindlejournal-ed in said recess and recess, a spindle journaled in saidtransverse a cam carried by said spindle for elevating recess, and apair of spaced cams carried by said lifting member. said spindle andadapted to be shifted into 10 23. ln a. valve spring lifter, the combinaand out of said spaced recesses.

F- tion of a lifting member, a cam support hav- Signed at New York city,N. Y., this 17th ing a transverse recess and a pair of spaced day ofDecember, 1923. recesses communicating with said transverse LOUISMAROELLUS WOOD.

